Educational system for dental radiography training using virtual reality

口腔摄影是口腔医学中常用的一种摄影方法。X线片的质量直接影响诊断结果的好坏。口腔摄影质量的好坏在很大程度上受放射技师技能的影响。在口腔医学院校学生的临床培训过程中，口腔摄影技术的训练是非常重要的。因此，在本实验中，我们构建了具有虚拟现实的口腔内X线摄影训练系统。研究分为以下三个阶段：1.检验最适合用于模拟的牙齿和颌骨的数据。明确学生对虚拟现实系统的感受。结果利用锥束CT获得的数据空间分辨率最高，数据转换最容易，虚拟空间的使用感觉相对较好，三维效果也较好。模拟图像精度相对较高，尚待解决的问题是成像时间长，图像长约5分钟，原始口腔内X线片图像分辨率不高。解决这些问题的必要性可以考虑到更高能力的计算机系统。

Intra-oral radiography is used frequently in dentistry. The quality of radiograph influences on diagnosis. The quality of intra-oral radiography is mostly affected by the skill of radiographers. In the course of clinical training of the students of dental school, it is important to train the technique of intra-oral radiography. So in this experiments we conducted to make up the training system of taking the intra-oral radiography with virtual reality.Research was divided in the next three stages:1. Examine the most appropriate data on the tooth and jaw bones for the use of the simulation.2. Clear the feeling of the virtual reality system for the students.3. Build up the program, which simulates an intra-oral X-rays, image and examine its precision.ResultsThe data obtained from cone beam CT is best for the simulation because the spatial resolution of that is most high and easy of data conversion.As for a feeling of the use of the virtual space, it was a comparatively good result as for the three dimensional effect.The program, which simulated images of intra-oral radiography, was made using Visual Basic. That simulation image was high precision comparatively.The unresolved problems are the time until an image was made which was long with about five minutes, and the image resolution was not good at original intra-oral radiograph. It could think about the computer system of the higher ability with the necessity to solve these problems.